Finding the Fourth Proportional to 9,956.48, 13,739.67 and 5,419.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,956.48 : 13,739.67 = 5,419.25 : x
2. Step 2: Convert to fraction form
   9,956.48/13,739.67 = 5,419.25/x
3. Step 3: Cross multiply
   9,956.48x = 13,739.67 × 5,419.25
4. Step 4: Simplify right side
   9,956.48x = 74,458,689.47
5. Step 5: Solve for x
   x = 74,458,689.47/9,956.48
6. Step 6: Final answer
   x = 7,478.42